Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements

Ingo Molnar a écrit :

* Ulrich Drepper <[email protected]> wrote:

what do you mean by that - which is this same resource?

From what has been said here before, all futexes are stored in the same list or hash table or whatever it was. I want to see how that code behaves if many separate processes concurrently use futexes.

futexes are stored in the bucket hash, and these patches do not change that. The pi-list that was talked about is per-futex. So there's no change to the way futexes are hashed nor should there be any scalability impact - besides the micro-impact that was measured in a number of ways - AFAICS.

Yes, that's completely right !

--
Pierre
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• References:
  • [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Pierre Peiffer <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Ulrich Drepper <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Pierre Peiffer <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Pierre Peiffer <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Ulrich Drepper <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Ulrich Drepper <[email protected]>
  • Re: [PATCH 2.6.20-rc4 0/4] futexes functionalities and improvements
    • From: Ingo Molnar <[email protected]>

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